Black Walnut Knife Scales 002. These gorgeous Knife Scales have been air dried and originate from North East Pennsylvania. These black walnut Knife Scales feature some curls, and chatoyancy. Colors can range from a brown, dark purple, and dark cream.The knife scales you see in the picture are the actual scales you will receive. Scale size is 2” x 3/8″ x 5″ +- 1/8″.